Home / 10,400.60-15,615.30-8,211.80

Finding the Fourth Proportional to 10,400.60, 15,615.30 and 8,211.80

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Solution

The fourth proportional to 10,400.60, 15,615.30 and 8,211.80 is: 12,329.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,400.60 : 15,615.30 = 8,211.80 : x
  2. Step 2: Convert to fraction form
    10,400.60/15,615.30 = 8,211.80/x
  3. Step 3: Cross multiply
    10,400.60x = 15,615.30 × 8,211.80
  4. Step 4: Simplify right side
    10,400.60x = 128,229,720.54
  5. Step 5: Solve for x
    x = 128,229,720.54/10,400.60
  6. Step 6: Final answer
    x = 12,329.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.